Hollow panel.



Patented Mar. 4,1919.

Vy. H. DOBLE. HLLow PANEL.4

APPLICATION FILED JULY 22. I9I8.

Illu

PTI I IIIIIIVNIIF UNITED STATES PATENT. onirica..A i

WILLIAM H. DOBLE, OF QUINCY., MASSACHUSETTS, ASSIGNOE 0F ONE-FOURTH T0 PNEUMATIC SCALE CORPORATION, LIMITED, 0F QUINCY, MASSACHUSETTS, A

CORPORATION OF MAINE.

Specification of Letters Patent.

HOLLOW PANEL.

Application filed my 22, 191s. serial No. 246,239.

To all whom z't may concern Be it known that lI, WILLIAM H. DOBLE, a citizen of the United States, residing at Quincy, county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Hollow Panels., of which the following is a specification, reference being had therein to the accompanying`drawings.

he invention relates to a. new and useful improvement-in hollow panels composed of two parallel plates 'forming the respective faces of the panel and an interposed truss plate which is united to the two face plates. The invention is intended to be especially applied in the construction of panels for use in making boxes, more particularly that type of boxes in which the panels 'have hi ed connection with each other so that the ox may be folded or knockeddown but the invention is not limited to use in connection with the manufacture of folding boxes or even boxes of any character, the invention being ap li'cable to the construction of hollow paneA s for any purpose in which strength and lightness are both desired. For con" venience of illustration the drawings show the invention as applied to a box panel.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings and the novel features thereof will be pointed out and clearly dened in the claims at the close of this specification.

'In the drawings, Figure 1 is a plan View of a panel constructed in accordance with the invention.

Fig. 2'is a cross section on line 2-2 of Fio. 1. v

IFig. 3 is a plan view of a portion of the panel shown in Fig. 1 on an enlarged scale, the panel being partly broken away.

Fig. 4 is a section on line 4- 4 of Fig. 3.'

Fig. 5 is a sectional` view taken on a similar lineto that on which Fig. 4 is taken showing a modified form of reinforcing or truss plate.

Fi 6 is a section showing the truss members l en t on a sharperangle than in Fig. 4, and the flat faced portions extending across the width of the V-shaped sections.

Referring now to the drawings, 1 andl 2 i represent respectively the two face plates ofthe panel, being made preferably of thin sheet metal, the two plates being parallel to each other and preferably having flat surfaces. y Interposed between these two face lates 1s a truss plate 3 which is bent in such o rm as to have certain portions contacting w1th the face late 1 and certain portions contactlng wit the face plate 2. In the .form sho-wn in Figs. 2 and 4 the truss plate 1s bent or formed to make a succession of angular undulations which are alternately v -shaped and inverted V-shape in cross section, the -apexes or ridges of the undulations contacting alternately with the face plates 1 and 2, that is as shown,`the apeXes 4 of Ithe inverted V-.shape portions contact with the upper face plate 1 as viewed in the drawings and the apexes 5 of the V-shaped portions conta-ct with the lower face plate 2.

zag appearance. These transverse portions' serve to brace the two face plates and will be referred to as strut portions. Each strut portion is in a plane which is inclined to the faces of the face plates. For convenience of designation the right hand strut portion of each V-shaped section is indicated by the numeral 6 and the lef-t hand strut portion is designated by the numeral 7. The strut portions 6 and 7 thus alternate with each other, the strut portions 6 being all parallell with each other and the strut portions 7 being all parallel with each other.

It is important that these reinforcing or truss members-shall be united to the inner and outer face platesvso as to retain them firmly in position. If the truss plates were simply secured to the faceplates along the linesof the apexes or ridges 4, 5 thisv would furnish' merel a line contact and Yunion which is insu cient to vgive proper strength and rigidity. It is important that. there should be a contact and union of some surface area between the ridges of the ytruss `1 plates.

Forv reason of economy 1n construction ;and for strength it is desirable that these -contact faces which engage the upper face plate do not come directly opposite the conl tact faces which engage the lower face plate.

Moreover it will be seen from Fig. 4 that the contact faces extend from the ridge portions out over the throat or mouth of the V-sliaped troughs.' These fiat contact surfaces are made in short sections as will be seen from Fig. l, and Fig. 3, there being several such portions struck up in the course of the length of each strut portion 6 and 7 with an interval between the struck up'portions of each strut so as to 4avoid weakening too much the strut portions. v

Each fiat faced contact portion 8, y9 is united firmly to the face plate with which it contacts by any suitable means that makes a permanent firm connection. This union is -preferably effected by means of what is known as the sweating process which fuses the two contacting faces together with an interposed fusible metal or forming the plates with a fusible 'metal facing or it may be done by soldering or even by riveting or other suitable means, but the sweating process is preferable so that when the parts are united it makes the entire panel virtually integral.

l In the modification shown in Fig.` 5 in forming the apexes or ridges 10 they are somewhat curved instead of sharp so that as viewed in end elevation or sectional view the truss plate has an undulating appearance. The flat faced contact portions 8 and 9 respectively are struck up in the same manner as already described.

In the modification shown in Fig 6 the iat faced contact portions 8, 9 extend across the entire width of the mouth of the V and the edges 11 of the said contact portions '8, 9 engage with the strut portions 7, 6,- thereby somewhat increasing the rigidity of 4the structure.

what I Claim' is:

1. A hollow panel composed of two face 'plates parallel with each other andan interposed truss plate having strut portions which extend crosswise from one face plate to` theother, and having tab portions which 3. A panel composed of two face plates parallel with and spaced apart from each other -and an interposed truss plate having strut portions which extend crosswise from one face plate to the'other, said strut portions having tabs struck up therefrom some of which contact with one of said face plates and others of which contact with the .other of said faceplates. f i

4. A panel composed of two face plates parallel with and spaced apart" from each other and an interposed truss plate having strut portions which extend crosswise from one face plate to the other, said strut portions having tabs struck up therefrom some' of which contact with one lof said face plates and others of which contact with the other of said face plates, said tabs being united to the plates with which they contact throughout the entire contacting surfaces.

5. A panel composed of two face plates parallel with and spaced apart from each other and an interposed truss plate shaped to form a series of strut portions which extend crosswise zig-zag from one face plate to the other with ridges at the junction of each pair of adjacent struts which engage with the respective face plates, said strut ortions having sections thereof struck up inthe form of tabs which Aform flat faced contacts with said face plates, said truss portions being firmly united to the said face plates in the contacting portions both of the ridges :and of the said tabs.

6. A hollow panel having an inner and an outer wall plate spaced apart from each other and .an interposed truss plate bent to form strut portions kwhich extend crosswise between the two wall plates, the bends in the truss plate between the strut portions forming ridges which alternately Contact with the two wall plates and having also fiat faced portions which project from ithe contacting ridge portions some of which contact4 with one of said wall plates and others of which contact with the other of said wall l plates. p Y

In testimony whereof I affix my signature.

WILLIAM H. DOBLE.` 

